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John T. Arundel and Co. was engaged in Pacific trading of phosphates, copra, and pearl shell. While working in the company's Sydney office in 1899 Ellis determined that a large rock from Nauru being used as a doorstop was rich in phosphate. Following the discovery Ellis traveled to Ocean Island and Nauru and confirmed the discovery.
The history of fertilizer has largely shaped political, economic, and social circumstances in their traditional uses. Subsequently, there has been a radical reshaping of environmental conditions following the development of chemically synthesized fertilizers .
5-2 million years ago: Hominids shift away from the consumption of nuts and berries to begin the consumption of meat. [1] [2]A hearth with cooking utensils. 2.5-1.8 million years ago: The discovery of the use of fire may have created a sense of sharing as a group.
Consequently, the widespread use of phosphate fertilizers has increased soil fluoride concentrations. [95] It has been found that food contamination from fertilizer is of little concern as plants accumulate little fluoride from the soil; of greater concern is the possibility of fluoride toxicity to livestock that ingest contaminated soils.
Phosphorus has a concentration in the Earth's crust of about one gram per kilogram (for compaison, copper is found at about 0.06 grams per kilogram). It is not found free in nature, but is widely distributed in many minerals, usually as phosphates. [37]
Phosphate is also used in animal feed supplements, food preservatives, anti-corrosion agents, cosmetics, fungicides, ceramics, water treatment and metallurgy. The production of fertilizer is the largest source responsible for minerals mined for their phosphate content.
7000 BC – agriculture had reached southern Europe with evidence of emmer and einkorn wheat, barley, sheep, goats, and pigs suggest that a food producing economy is adopted in Greece and the Aegean. 7000 BC – Cultivation of wheat, sesame, barley, and eggplant in Mehrgarh (modern day Pakistan).
In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid, a.k.a. phosphoric acid H 3 PO 4. The phosphate or orthophosphate ion [PO 4] 3− is derived from phosphoric acid by the removal of three protons H +.